Key West, FL

Weather Forecast Office

NWS Key West

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Last Map Update: Sun, Oct 18, 2026 at 8:40:15 am EDT

Watches, Warnings & Advisories

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High Surf Advisory

Small Craft Advisory

Rip Current Statement

Marine Weather Statement

Short Term Forecast

Small Craft Advisory

Heavy Rainfall Potential

Florida Keys Five Day Outlook

Island Chain

Marine Winds

Wave Heights

Increasing winds have led to the issuance of a Small Craft Advisory for all of the Florida Keys coastal waters! Hazardous marine conditions will be present around the Florida Keys with winds increasing to 20-25 knots and seas in some areas exceeding 6 feet. Inexperienced mariners, especially those operating small craft should stay in port until conditions improve. Get the latest marine forecast details at weather.gov/key/marine

The Weather Prediction Center has outlooked the Upper Florida Keys for a marginal risk (Level 1 out of 4) of excessive, flooding rainfall, from 8 AM Sunday to 8 AM Monday. There is a potential for heavy rainfall to result in minor flooding of streets, parking lots, and other poor-drainage areas in the Upper Florida Keys - including Islamorada, Tavernier, Key Largo and Ocean Reef, through Monday morning.

Windy conditions have developed ahead of and along an approaching cold front. Shower chances will decrease during the early part of the week as a drier air mass moves over South Florida. Winds are on track to gradually slacken to breezy by the end of the week.

TODAY: Mostly cloudy. Showers likely with a chance of thunderstorms. Windy with highs in the mid 80s. NE winds near 20 mph. Chance of rain 60 percent

A Small Craft Advisory is in effect for all Keys Coastal Waters. TODAY: NE fresh to strong breezes. Seas: Bay/Gulfside 3-5 ft, ocsnl 9 ft, except W of the Marquesas 6-7 ft, ocsnl 9 ft; Hawk Channel 2-4 ft, ocsnl 5 ft, except W of Cosgrove 5-6 ft, ocsnl 8 ft; FL Straits 5-7 ft, ocsnl 9 ft, except in the E Straits building to 7-9 ft, ocsnl 11 ft; SE Gulf 5-8 ft, ocsnl 10 ft. Bay / nearshore waters very rough. Showers likely with a chance of t'storms

A Small Craft Advisory is in effect for all Keys Coastal Waters. TODAY: NE fresh to strong breezes. Seas: Bay/Gulfside 3-5 ft, ocsnl 9 ft, except W of the Marquesas 6-7 ft, ocsnl 9 ft; Hawk Channel 2-4 ft, ocsnl 5 ft, except W of Cosgrove 5-6 ft, ocsnl 8 ft; FL Straits 5-7 ft, ocsnl 9 ft, except in the E Straits building to 7-9 ft, ocsnl 11 ft; SE Gulf 5-8 ft, ocsnl 10 ft. Bay / nearshore waters very rough. Showers likely with a chance of t'storms

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Autumn Temperatures for Eastern Third of the Country; Developing Offshore Coastal Storm

NWS Key West